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F. W-. BOUGHTON. SLIDE-UPQTURNOVER DOOR.

APPLICATION FILED nEc.10. 191a.

' 'PatentedSept. 23,1919.

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SLIDE-UP TURNOVER 000R.

APPLICATION FILED 020.10. 1918.

Patented Sept. 23; 1919.

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- SLIDE-UP TURNOVER DOOR.

APPLICATION FILED DEC.I0| l9l8. 1,316,677, PatentedSept. 23,1919.

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FRED W. BOUGHTON, OF AURORA, ILLINOIS.

SLIDE-UP TURNOVER DOOR r Specification of Letters Patent. Patented Sept. 23, 11919.

Application filed December 10, 1918. Serial No. 266,028.

I citizen of the United States, residing at vertical or closed position; and

pulley, &c.

Aurora, in the county of Kane and State of Illinois, have invented certain new and useful Improvements in Slide-Up Turnover Doors, of which the following is a specification.

This invention relates to slide-up, turnover doors of the large'and heavy type emloyed in factories, warehouses and other ui dings and on iers, docks and other structures and whic comprise one or more sections vertically disposed when the door is in its lowered or closed position and adapted to slide upwardly and outwardly asthe door israised or opened, the sections in some instances being hinged together to fold one upon the other.

The object of the invention is to so equip, counterbalance and support the door, whether of a single or multiple section, or of the folding type, that the space required for its disposltion and operation shall be reduced to a minimum and its operation made simple, safe and effective; and the particular object of the invention is to provide means for starting the door from its vertical position and adequately supporting and counterbalancing it as it leaves its vertical position and assumes and maintains a horizontal or approximately horizontal position and as it returns to its original vertical position.

The invention is illustrated by the. accompanying drawings, in which a Figure 1 is the front view of the door in its vertical or closed position;

Fig. 2 is a side view of the door in its horizontal or open position;

Fig. 3 is a side view of the door in its of the The door 1 fits into frame 2 andis furnished at its lower corners with Wheels 3 adapted to travel up and downsuitable tracks 4 in the frame. The door is raised and lowered by means of oppositely disposed cables 5, each of which is attached to an upper corner and to the corresponding lower corner of the door and winds, intermediate its ends, upon itself in grooves 6 and 6 of the triple-grooved pulley 6 fixedly mounted on shaft 7, whereon are also fixedly, mounted pinion 8 and conical, spiral pulley Fig. 4 is a view partly in section 9. The sprocket wheel 10 is fixedly mounted on shaft 11 whereon is also fixedly mounted gear 12, which engages-pinion 8.

In Fig. 4 in dotted lines the position of these gears is reversed, gear 12 being shown as 12 mounted on shaft 7, while pinion 8 is shown as 8 mounted on shaft 11, which is obviously a better arrangement.

Each of the cables 5 is preferably of one piece and extends, when the door is lowered (Figs. 1 and 3), from a lower corner of the door to the bottom of the inner groove 6 (Fig. 4), thence to the bottom of the adjacent groove 6, thence wound upon itself to the top of said adjacent groove and thence to the corresponding upper corner of the door; the parts being so proportioned and disposed that the cables readily wind and unwind and as the door is raised reverse their position relative to their respective grooves. The hand chain 13 engages sprocket wheel 10 and affords means for rotating shaft 7 v thus far describedis that afl'orded by the cables 5 and on these the strain is very great.

The present improvement provides additional means for supportin the door in a novel, safe, simple and e ective manner comprising cables 16 attached to the top of the door and extendin when the door is in its lowered position (Figs. 1 and 3), each, from the top of the door to a pulley 17 disposed above the outer end of the door (when raised Fig. 2) and thence to the bottom of groove 6 of the triple-grooved pulley 6 where it is attachedthereto.

in in its closed or vertical position, and the ca les and weight being in the position shown in Figs. 1 and 3, the operator pulls upon the hand chain 10 thereby rotating shaft 7 and the pulleys afiixed thereto, whereby cables 5 wind (and unwind) upon themselves thus raising and supporting the outer end of the door as it travels outwardly, while the cables 16 wind upon themselves thereby aflording additional support to the door; and to lower the door the hand chain is pulled in the opposite direction thereby reversin all of the movements above described.

The operation is as follows: The door he The cables 16 not only support the door but also serve to start the door from its vertical position, while the weight 14: compensatingly counter-balances the door as the weight cable 15 traverses the conical, spiral pulley. The invention is plainly applicable to a door having more than one section or having hinged members, it being simply necessary to attach the outer end of the cables 16 to that part of the door which constitutes its outer end when raised.

I claim 1. In a, slide-up, turn-over door, means for raising and lowering the door and supporting means therefor, including flexible eleinents attached to that portion of the door constituting its outer end, when raised, and running thence to guide pulleys disposed above the space occupied by said outer end of the door, when raised, and running thence to grooved pulleys on which grooved pulleys said flexible elements wind upon themselves as'the door is being raised and from which they unwind as the door is being lowered.

2. In a slide-up, turn-over door, means for raising and lowering the door and supportingmeans therefor, including a flexible element attached to that portion of the door constituting its outer end, when raised, and running thence to a point above the space occupied by said outer end of the door, when raised, and thence operatively connected with means for winding the flexible element as the door is raised and for unwinding it as the door is lowered.

3. In a slide-up, turn-over door, means for raising and lowering the door and supportingmeans therefor, including a flexible element attached to that portion of the door constituting its outer end, when raised, and running thence to a point above the space occupied by said outer end of the door, when raised, and thence operatively connected with means for winding the flexible element as the door is raised and for unwinding it as the door is lowered, by a predetermined variable motion.

In testimony whereof I have aflixed my signature.

FRED w. BoUeHToN. 

